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11th grade Motion energy and stored energy of particles worksheet

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Motion energy and stored energy of particles

Grade 11 Science Worksheet

NameDate

Circle the best answer, or write your answer on the line.

  1. A gas is warmed from 27 °C to 327 °C. To the nearest hundredth, how many times larger is its particles' average kinetic energy, Ari?

  2. A gas is warmed from 20 °C to 80 °C. To the nearest hundredth, how many times larger is its particles' average kinetic energy, Bo?

  3. A gas is warmed from 10 °C to 50 °C. To the nearest hundredth, how many times larger is its particles' average kinetic energy, Esme?

  5. In the energy bar chart, which store does the energy go into as the ice melts, Jun?

    • Neither, since melting needs no energy
    • Particle kinetic energy, so the ice warms
    • Particle potential energy

  6. In the energy bar chart, why does the temperature stay at 0 °C while the ice melts, Kira?

    Use the picture in question 4.

    • No energy goes in
    • The particles speed up, but the thermometer can't tell
    • The particles' average motion energy doesn't change

  7. In the energy bar chart, how much does the particle potential energy grow, Luz?

    Use the picture in question 4.

    • 0 J
    • 434 J
    • 334 J

  9. In the heating-curve graph, what is happening along the first flat part, Milo?

    • The ice is warming up
    • The ice is melting
    • The water is boiling

  10. In the heating-curve graph, which particle store grows along the flat parts, Noah?

    Use the picture in question 7.

    • Neither, since the temperature is flat
    • Particle potential energy
    • Particle kinetic energy

  11. A hand-warmer packet heats up as its iron powder reacts with air. Where did the energy come from, Tala?

    • Particle potential energy in bonds and arrangements
    • The packet's motion
    • Sunlight stored in the air

  12. Water evaporates from a warm dish. Why does the water left behind cool, Zee?

    • Evaporation adds energy to the water
    • The particles left behind grow bigger
    • The fastest particles leave, lowering the average
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11th grade Motion energy and stored energy of particles worksheet – printable
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About this worksheet

Motion energy and stored energy of particles. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

  • I can convert °C to kelvins (K = °C + 273.15) and explain absolute zero. Particles still move at 0 °C.
  • I can say that temperature tracks the particles' average kinetic energy. The ratio of two gas energies is the ratio of their kelvin temperatures, and the average kinetic energy is (3/2)kT.
  • I can explain stored energy at the particle scale. Springs and rubber bands store energy in particle spacing; chemical energy is stored in bonds and arrangements; melting raises particle potential energy at a steady temperature.
  • I can tell temperature (an average) from thermal energy (a total that grows with the amount of matter).

Standard: HS-PS3-2

Words to know

particle kinetic energy: Energy of particles' motion; thermal energy

particle potential energy: Energy stored in how particles are placed or bonded

kelvin (K): Temperature counted from absolute zero; K = °C + 273.15

absolute zero: 0 K, where particle motion is at its lowest

change of state: Melting, freezing, boiling: particles move apart or together

Common mistakes

Your child subtracted 273.15. Kelvin temperature is the Celsius temperature plus 273.15.

Your child thought particles stop at 0 °C. Particles slow toward their least motion only near absolute zero, 0 K, which is −273.15 °C.

Your child divided Celsius temperatures. Particle kinetic energy follows kelvin temperature, so change to kelvins first.

Questions parents ask

What is the most common mistake with motion energy and stored energy of particles?

Your child subtracted 273.15. Kelvin temperature is the Celsius temperature plus 273.15.

Are these 11th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

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